Drinking vessel



FIG. 1 is a top front perspective view of a drinking vessel showing my new design;

FIG. 2 is a side elevational view thereof taken in the direction of arrow A on FIG. 1;

FIG. 3 is a rear elevational view thereof taken in the direction of arrow B on FIG. 1; and

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a drinking vessel, as shown. 